Image processing apparatus, image processing method, and non-transitory computer readable recording medium

An image processing method executed by a processor of an image processing apparatus by executing a program stored in a memory of the image processing apparatus, the method comprising:

• acquiring a plurality of picked-up images picked up by a plurality of image pickup systems,
• individually calculating a white balance of each of the plurality of picked-up images,
• setting a white balance of a joint of the plurality of picked-up images, the white balance of the joint being a value between the calculated white balances,
• individually calculating interpolated values between the calculated white balances and the set white balance of the joint by an interpolation function,
• individually correcting the white balances by continuously varying the white balances in the plurality of picked-up images based on the calculated interpolated value,
• individually adjusting the plurality of picked-up images based on the calculated white balance of each of the plurality of picked-up images, the white balance of the joint, and the corrected white balances, and
• synthesizing the plurality of adjusted picked-up images to generate a wide angle image.

A non-transitory computer readable recording medium storing a computer-readable program that is executable by a computer to perform functions comprising:

• acquiring a plurality of picked-up images picked up by a plurality of image pickup systems,
• calculating a white balance of each of the plurality of picked-up images,
• setting a white balance of a joint of the plurality of picked-up images, the white balance of the joint being a value between the calculated white balances,
• individually calculating interpolated values between the calculated white balances and the set white balance of the joint by an interpolation function,
• individually and continuously varying the white balances in the plurality of picked-up images based on the calculated interpolated values to correct the white balances,
• individually adjusting the plurality of picked-up images based on the calculated white balance of each of the plurality of picked-up images, the white balance of the joint, and the corrected white balances, and
• synthesizing the plurality of adjusted picked-up images to generate a wide angle image.